From 78dd7240cc9ad6551b801942fc6006e718a15114 Mon Sep 17 00:00:00 2001
From: Derek Higgins <derekh@redhat.com>
Date: Wed, 6 Sep 2017 12:10:58 +0100
Subject: [PATCH] Assert that IPv6 ctlplane networks should be /64

We're using statless addressing for the ctlplane with requires
a /64 network.

Change-Id: Ic70b70f1363b97ab7b9e6c671f3106ce350a08a8
---
 instack_undercloud/validator.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/instack_undercloud/validator.py b/instack_undercloud/validator.py
index 604fb2215..e53fcfa9b 100644
--- a/instack_undercloud/validator.py
+++ b/instack_undercloud/validator.py
@@ -61,6 +61,10 @@ def _validate_value_formats(params, error_callback):
         local_ip = netaddr.IPNetwork(params['local_ip'])
         if local_ip.prefixlen == 32:
             raise netaddr.AddrFormatError('Invalid netmask')
+        # If IPv6 the ctlplane network uses the EUI-64 address format,
+        # which requires the prefix to be /64
+        if local_ip.version == 6 and local_ip.prefixlen != 64:
+            raise netaddr.AddrFormatError('Prefix must be 64 for IPv6')
     except netaddr.core.AddrFormatError as e:
         message = ('local_ip "%s" not valid: "%s" '
                    'Value must be in CIDR format.' %